You will need

- calculator

Instruction

1

Recall that by definition, the Newton (N, N) is equal to the force gives the body a mass of 1 kg acceleration of 1 m/s^2 in the direction of action of the force. If the strength in Newtons obtained by you as a result of calculations in the course of solving the problem, re-calculate everything again, check yourself. Make sure that you have made the preliminary calculations are correct and you are absolutely precisely calculated force in Newtons. Next, recall that Pascal (Pa)equal to the pressure which causes a force equal to one Newton uniformly distributed on a surface area of 1〖 m〗^2 that is perpendicular to this force. That is, by definition: 1 PA=N/m^2.

2

Calculate the surface area, which is under pressure in accordance with the terms of the tasks set before you. To compute the area apply the appropriate mathematical formula. Please note that the area must be measured in square metres and not in any more units. If necessary, make a translation of your existing units of area measurement in square meters. Divide previously received by you in Newtons force on the area in square meters. For calculations, use a calculator. The result of the division is required you pressure is indicated in Pascals. Write down the result. The problem is solved.

3

Call a classmate, a classmate or a friend who knows physics (assuming that all that is written above does not help you). Tell him about your problem. Politely ask him to stop laughing and to dictate a solution to this problem is up to each numbers and letters, or to send an SMS, MMS or email. If the request was denied, or among your acquaintances there is no one versed in physics, the person will ask for help to the users of the Internet. Surely among the inhabitants of any theme of the forum will find at least one helpful person, who will write you a detailed solution to your problem absolutely free. Thank this man and rewrite the solution.

4

Re-read textbooks on physics and still try to understand at least part of what is written there. If necessary, seek clarification from the teacher. The obtained knowledge will be useful to you in your life again and again.

# Advice 2 : How to convert pressure in Pascal

**Pressure**is a physical quantity that shows what force is acting on a particular surface. Body, the substances which are in different aggregate States (solid, liquid and gaseous), pressure in completely different ways. For example, if in Bank to put a piece of cheese, he will put pressure only on the bottom of the jar, and full of the milk, acts with a force on the bottom and sides of the vessel. In the international system of measurement the pressure is measured in Pascals. But there are other units of measurement: millimeters of mercury, Newtons divided by the kilograms, kilo

**Pascals**, hecto

**Pascals**, etc. the Relationship between these variables is established mathematically.

Instruction

1

The unit of pressure Pascal is named after the French scientist Blaise Pascal. It is denoted: PA. When solving problems and practice applicable values with a multiple or decimal fraction of the metric prefixes. For example, kilo

**Pascals**, hecto**Pascals**, Milli**Pascals**, mega**Pascals**, etc. To turn these values to**Pascals**, you must know the mathematical meaning of the prefix. All the available consoles can be found in any physical directory. Example1. 1 kPa=1000Па (one kilopascal is one thousand Pascals). 1 hPa=100nA (one hectopascal is one hundred Pascals). 1MPa= 0.001 PA (one millipascal equals zero point one-thousandth share of Pascal).2

**Pressure**of solids is generally measured in Pascals. But what is physically equal to one Pascal? Based on the determined pressure, calculate the formula for its calculation and displays the unit of measure.

**Pressure**is equal to the ratio of the force perpendicular to the current bearing to the surface area of this support. p=F/S, where p is the pressure, measured in Pascals, F is the force, measured in Newtons, S is the surface area, measured in square meters. It turns out that 1 PA=1N/(m) squared. Example 2. 56 N/(m) squared =56 PA.

3

**The pressure**of the air shell of the Earth is called atmospheric pressure and to measure it in Pascals, and millimeters of mercury (hereafter " mm Hg. calendar). In 1643 an Italian scientist Torricelli was offered the experience of pressure measurement, which used a glass tube with mercury (hence the "mercury column"). It was measured that the normal pressure of the atmosphere is equal to 760 mm Hg. article that is numerically equal to 101325 Pascals. Then, 1 mm Hg.St. ~ A cash consideration of 133,3 PA. To convert millimeters of mercury to

**Pascals**, multiply this value is 133.3. Example 3. 780 mm Hg. article = 780*cash consideration of 133,3 = 103974 PA ~ 104кПа.

# Advice 3 : How to convert from millimeters of mercury to Pascals

The millimeters of mercury and Pascals used to measure pressure. Although Pascal is the official system unit non-si millimeters of mercury according to its frequency were not inferior to them. "Millimeters" even have their own name – "Torr" (torr), given in honor of the famous scientist Torricelli. Between the two units there is an exact relationship: 1 mm Hg. article = 101325 / 760 PA, which is the definition of the unit "mm Hg. article".

You will need

- calculator;
- computer;
- - the Internet.

Instruction

1

To convert a pressure given in millimeters of mercury, Pascals, multiply the number of mm Hg. article on the number of 101325, and then divide by 760. That is, use a simple formula:

KP = Km * 101325 / 760,

where:

Km – pressure in millimeters of mercury (mm Hg. art., mm Hg, Torr., torr)

KP is the pressure in Pascals (PA, RA).

KP = Km * 101325 / 760,

where:

Km – pressure in millimeters of mercury (mm Hg. art., mm Hg, Torr., torr)

KP is the pressure in Pascals (PA, RA).

2

The use of the above formula gives the exact correspondence between the two measurement systems. For practical calculations use a simple formula:

KP = Km * 133,322 or simplistic KP = Km * 133.

KP = Km * 133,322 or simplistic KP = Km * 133.

3

When the pressure in Pascal note that when measuring blood pressure in weather reports, as well as among engineers vacuumseal often shorten the name of "mm Hg. article" to "mm" (sometimes omitted and millimeters). Therefore, if the pressure is given in millimeters or just a number is specified, then it's probably mm Hg. the article (if possible, still more precise). When measuring very low pressure is mm Hg. the article "vacuumsthe" apply unit "microns of mercury", which is commonly referred to as "microns". Accordingly, if the pressure is specified in microns, then simply divide that number by a thousand and get the pressure in mm Hg. article

4

When measuring high pressures often used such a unit as "atmosphere", corresponding to normal atmospheric pressure. One atmosphere (ATM, atm) equals 760 mm Hg. article that is, for obtaining the pressure in mm Hg. article, multiply the number of atmospheres to 760. If the pressure is specified in "technical atmospheres", to translate pressure in mm Hg. St. multiply this number by 735,56.

5

Example.

The tire pressure of the car is 5 atmospheres. What will be the pressure expressed in Pascals?

Solution.

Move pressure from atmospheres to mm Hg. article: 5 * 760 = 3800.

Put the pressure of mm Hg. article in the Pascal: 3800 * 133 = 505400.

Response.

505400 PA (or $ 505.4 bn kPa).

The tire pressure of the car is 5 atmospheres. What will be the pressure expressed in Pascals?

Solution.

Move pressure from atmospheres to mm Hg. article: 5 * 760 = 3800.

Put the pressure of mm Hg. article in the Pascal: 3800 * 133 = 505400.

Response.

505400 PA (or $ 505.4 bn kPa).

6

If you have a computer or a mobile phone with access to the Internet, just look for any online service convert physical units of measure. To do this, type in a search engine a phrase such as "translate from mmHg to Pascal" and use the instructions on the service website.